まだ無名だが実力は本物だ。

Meaning
he is still unknown, but his abilities are real

Vocab used in this sentence

まだ
still, yet, not yet, haven't yet, already
無名
unsigned, nameless, anonymity, anonymous, unknown, unnamed, obscure, obscurity
is, be, are, am, it is, seems
is, there, but, ga, will, however
実力
ability, merit, force, arms, efficiency, meritocracy
a, the, is, am, are, will
本物
real, genuine, authentic, the real thing, genuine article, authentically
is, be, are, am, it is, seems

The developer Jeffrey van Binsbergen is known for his high quality work and optimalisations.